Portable display device



FIG. 1 is a perspective view of a portable display device;

FIG. 2 is a front elevation view of the portable display device of FIG. 1;

FIG. 3 is a rear elevation view of the portable display device of FIG. 1;

FIG. 4 is a left side elevation view of the portable display device of FIG. 1;

FIG. 5 is a right side elevation view of the portable display device of FIG. 1;

FIG. 6 is a top plan view of the portable display device of FIG. 1;

FIG. 7 is a bottom plan view of the portable display device of FIG. 1;

FIG. 8 is a perspective view of the portable display device of FIG. 1 illustrating an example in which an image is displayed on a display screen of the portable display device;

FIG. 9 is a perspective view of the portable display device of FIG. 1 illustrating another example in which an image is displayed on a display screen of the portable display device; and,

FIG. 10 is an elevation view illustrating the portable display device of FIG. 1 in use.

Broken lines shown in the drawings illustrate portions of the portable display device and form no part of the claimed design. 

CLAIM The ornamental design for a portable display device, as shown and described. 